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An home made magnetic loop antenna project using a military surplus 150pf capacitor by KF5CZO

An efficient monoband end-fed half wave for 10m, 20m or any other HF band

A 5 elements homemade DK7ZB yagi antenna for 4 meters band based on a 50MHz TONNA

An homebrew project for a 3 element coil-loaded Yagi beam antenna for 40 Meter band

Demonstrates the adaptation and construction of a 7-element DK7ZB Yagi antenna for the 4-meter band (70 MHz), utilizing components from a defunct 2-meter CUE DEE Yagi. The resource details the modifications made to the original DK7ZB design to fit the shorter CUE DEE boom length, specifically adjusting element lengths for 6mm rod elements while reusing existing mounting holes for the reflector and last director. It provides precise element lengths for the reflector, dipole (12mm aluminum tube), and five directors, along with a note on cutting elements for transport. The article includes a 4NEC2 simulation file for performance analysis and an SWR plot, confirming the antenna's electrical characteristics. It also specifies the calculation for the quarter-wavelength matching cable using SAT752F coaxial cable, resulting in a 909mm length. Practical application is shown with the finished antenna in operation at JO20XC, listing several activated Maidenhead squares such as JO56PA and JP40KS, validating its effectiveness for portable 70 MHz operations.

Makers of oscilloscopes, spectrum analyzers, frequency counters, power supplies and more testi equipment products

With this tool it is possible to create QSO maps overlay on Google maps there each QSO get a line from the home location to each DX location. An EDI logbook file is used as input. The creation will only use complete locator in the 6 characters format.

Reporting program that help you keep track of contacts and take care of the routing activity of creating reports and QSL cards. Require miLog logging program

Personal review of the Yaesu VX-6R handheld transceiver

Demonstrates the _SQUIRL Field Day Logger_, a specialized software tool designed for efficient contact logging during the annual ARRL Field Day event. The resource details its core functionality, which includes real-time logging to easily readable text files, with filenames structured by callsign, band, and mode (e.g., K8DAA-20M-SSB.txt). It highlights features such as a real-time history grid of previous contacts, a dynamic USA and Canada map displaying contact locations, and a duplicate checker that provides audio notifications and pre-fills class/section data for previously worked stations. The software also includes an ADIF export function, enabling users to transfer logs to other general-purpose logging programs. The software's design emphasizes simplicity and ease of use, allowing for rapid on-the-spot training, as noted by users like W4CMB. It supports various operating systems, including Windows 98 through 8, and has been successfully run on Linux via _Wine_. Key usability enhancements include a "double-size" feature for improved readability and a "Space Mode" for quick field navigation. The version history indicates continuous development from 2001 to 2013, with significant additions like the real-time Field Day Map in 2003 and ADIF export in 2004, which allows for seamless integration with other logging platforms.

We are committed to constantly improving our solutions in areas of GPS System, GPS Receivers, GPS Antennas, GPS Dataloggers, RF Modules, Wireless Security Systems, Automatic Vehicle Location (AVL) for real time and passive tracking

Building Eggbeater II Omni low Earth orbit satellite Antennas for 70cm by ZR6AIC

A very interesting blog article on a real world comparison on the popular multiband wire antenna, the G5RV, by Bob Raynor N4JTE

Ham radio blog dedicated to military radio equipment by EA3FOW

Antarctica station DP1POL log online

Don't neglect one of the most important parts of your station!

A home made dipole antenna for 10m, 6m, 4m bands made with two sections of 450 and 300 Ohm ladder lines, cut to achieve acceptable SWRs on all bands

A 2 element Narrow Diamond Loop Array for 40 Meters by VE3VN

JL is a free contest logger written entirely in Java. Run under Windows, Linux, Solaris, and MacOS X by W1JQ

Some basic antenna information for the newcomer

How to build a phasing harness for stacking antennas

Personal Blog devoted to ham radio topics,homebrew,antenna,satellite and other projects

A mini balun 1:1 4:1 project by WV0H

zLog for Windows is a freeware full-featured contest logging software that runs on Windows. It supports major international and domestic (JA) contests and is customizable to many other contests not directly supported by zLog. Features include CW keying via parallel/serial/USB interfaces, highly sophisticated TCP/IP network that allows instant synchronization of a log of an M/M station, rig control, PacketCluster connenction. By JJ1MED/AD6AJ

9Q0HQ Congo DXPedition Online Log

Expeimenting with DSP digital signal processing on Arduino

Cloudlog is a web-based amateur radio logging application built with PHP and MySQL, supporting station logging activities from HF to microwave. It integrates with companion tools for CAT control and automation, offering a flexible solution for managing QSO data. The application provides a self-hosted platform for amateur radio operators to maintain their logbooks, facilitating interaction with various ham radio operations. Its open-source nature allows for community contributions and customization, enhancing its utility for diverse operating preferences. Originally started by Peter, **2E0SQL**, Cloudlog was designed to enable simple interaction with the Ham Radio Deluxe logbook using MySQL.

The County Hunting software, version **6.1**, is designed for amateur radio operators focused on USA-CA Award tracking and logging. This application supports _Windows_ environments and facilitates the import and export of ADIF files, enhancing QSL management by integrating electronic confirmations via LoTW and e-QSL. The software has been updated to align with the new award rules managed by MARAC, following the discontinuation of CQ magazine's involvement. Users can visualize QSLs post-scanning and benefit from enhanced ADIF import functionality. Version 5.4 introduced accelerated county searches via FCC databases, with filters for QSL confirmations and e-QSL enhancements. The software also includes a feature for backing up and restoring QSOs by LoTW confirmations. Visual County tools have been refined, offering improved map interactions and the addition of county flags. The software supports various digital modes including FT8, FT4, and SSTV, and includes functionality for PSK250 and 60m bands. The application is multilingual, with support for Italian, English, French, and Spanish, and provides automated updates and web-based county searches. DXZone Focus: County Hunting | ADIF | Windows | LoTW

An homebrew Lindenblad antenna designed specifically for LEOs reception.

A simple antenna analyser for the HF spectrum with a built-in signal generator with 3-digit LED frequency display.

Repairing and restoring a Yaesu FL-2100Z amplifier

Assembling a Code-Practice Oscillator, a PDF by ARRL

Logipic is a PIC Programer for windows

Repairt a Heathkit SB-220 Linear Amplifier with a bad Plate Voltage meter

An Offset Attenuator for fox hunts.

Community blog at livrjournal

Demonstrates various practical amateur radio projects and technical discussions through video episodes. One episode details cutting and retuning a _1/4 wave shorted stub_ from 101.7 MHz to 107.5 MHz to safeguard a transmitter's driver stage, alongside insights into advanced _160-meter antenna systems_ like eight-circle arrays and beverage antennas. Another segment covers upgrading firmware on an _ATS-20+_ receiver using AverDudes for improved display and functionality, and a detailed guide on using D-Star DR mode on an _ICOM ID-52A_ for international repeater programming. Additional content includes a deep dive into _OpenHamClock_ as a potential replacement for the HamClock project, updates on _Raspberry Pi 5_ running Trixie OS, and a review of the Choyong LC90 Internet radio with AI integration. The series also features "Ham College" episodes, which meticulously prepare viewers for the Technician Exam by covering topics such as antenna and transmission line measurements, SWR interpretation, and the functions of basic electronic components like rectifiers, relays, and transistors. Practical advice on coaxial cable characteristics, dummy loads, and proper soldering techniques is also provided.

Program which will allow you easy migration from logPlus to another logging software. Tested with Logger by K4CY so let me know it you have problem ADIF import to other software.

Settng up a 40 meter WSPR beacon based on Raspberry Pi by VA3PAW

A simple 50 ohm dummy load to test transmitters. includes a simple RF diode detector to measure the peak voltage, and calculate the power

Vanuatu - YJ 2010 - DXpedition info and online log

Antenna model for a diamond loop wire antenna for the 40 meter band

QScope.org is an advanced statistics online application with innovative features for HAM Radio operators logs. While designed with amateur radio contesters score improvements in mind, it can help any HAM to have a better visibility over its logbook. You can import ADIF or Cabrillo logs and have various statistics like QSOs per band, mode, operator; QSOs Rate; Operating Time...

An homebrew project for a 4 elements yagi monoband antenna for the 10 meters by 9M2MSO

Log Online for HK0NA

low-noise amplifier for HF reception, amplifies signals 80 to 100 times between 0.15 MHz and 30 MHz. It will let you hear more signals with your RTL-SDR plus Ham-It-Up setup

Homebrew GMRS 3 Element Yagi yagi for 462-467 MHz

A review of the Yaesu FT-857D mobile transceiver by yo3hjv

This QST article describes the electrical and mechanical design process for two LPs that cover the HF bands from 10-30 MHz

Amateur Radio Web based logbook, initially linked to ham radio deluxe log and now supported by other popular log book programs, permit to publish a searchable contacts log, maps logs, and display a timeline of contacts.